Pravastatin Dosing
The standard dosing range for pravastatin is 10-40 mg once daily, with no dosage adjustment required for renal impairment, hepatic disease, or elderly patients in most circumstances. 1
Standard Dosing Regimen
Adults: The recommended starting dose is 40-80 mg once daily, taken at any time of day with or without food 1. The medication can be administered as a single daily dose without regard to meals, which enhances compliance for long-term therapy 2.
Pediatric patients (ages 8 and older with heterozygous familial hypercholesterolemia):
- Ages 8-13 years: 20 mg once daily
- Ages 14-18 years: 40 mg once daily 1
Dose Adjustments for Special Populations
Severe Renal Impairment
In patients with severe renal impairment (creatinine clearance <30 mL/min), start with 10 mg once daily and do not exceed 40 mg daily 1. This conservative approach is recommended despite evidence showing pravastatin pharmacokinetics are minimally affected by renal dysfunction due to its dual hepatic and renal elimination pathways 3. The KDOQI guidelines confirm that pravastatin requires no dosage adjustment for mild to moderate kidney disease 4.
For patients with mild to moderate renal impairment, use the standard adult dosing without adjustment 1.
Hepatic Disease
No dosage adjustment is needed for patients with compensated chronic liver disease 1. Pravastatin is contraindicated only in acute liver failure or decompensated cirrhosis 1. High-dose pravastatin (80 mg daily) has been demonstrated safe in patients with well-compensated chronic liver disease, including those with nonalcoholic fatty liver disease and chronic hepatitis C 5.
Elderly Patients
No dosage adjustment based on age alone is required 1. Pravastatin has been extensively studied in elderly patients (≥65 years) and demonstrates similar efficacy and tolerability compared to younger adults 6, 7. The 2019 ACC/AHA cholesterol guidelines support initiating moderate- or high-intensity statin therapy in patients over 75 years with clinical ASCVD after evaluating potential benefits, adverse effects, drug interactions, frailty, and patient preferences 8, 9.
Drug Interaction Dosing Modifications
Cyclosporine: Start with 10 mg once daily; maximum dose 20 mg daily 1
Clarithromycin or Erythromycin: Maximum dose 40 mg daily 1
Bile acid sequestrants: Administer pravastatin at least 1 hour before or 4 hours after the bile acid sequestrant 1
Clinical Monitoring
Assess LDL-C as early as 4 weeks after initiating therapy and adjust dosage as needed 1. For patients requiring high-intensity statin therapy or unable to achieve LDL-C goals on pravastatin 80 mg daily, consider alternative LDL-lowering treatments 1.
Key Advantages of Pravastatin
Pravastatin's hydrophilic nature results in minimal penetration into non-hepatic tissues, rapid absorption and excretion without plasma accumulation, and approximately 50% protein binding—reducing potential for drug-drug interactions compared to other statins 2. The dual hepatic (53%) and renal (47%) elimination routes minimize the need for dosage adjustments in organ impairment 2, 3.